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Polymers (Basel). 2019 Feb 1;11(2). pii: E229. doi: 10.3390/polym11020229.

Electrostatic-Interaction-Driven Assembly of Binary Hybrids towards Fire-Safe Epoxy Resin Nanocomposites.

Liu L1,2, Wang W3,4, Shi Y5, Fu L6, Xu L7, Yu B8.

Author information

1
College of Environment and Resources, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China. lyqian@mail.ustc.edu.cn.
2
Hefei Institute for Public Safety Research, Tsinghua University, 5999 Xiyou Road, Hefei, Anhui 230026, China. lyqian@mail.ustc.edu.cn.
3
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Anhui 230026, China. wwei433@mail.ustc.edu.
4
Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon 999077, Hong Kong. wwei433@mail.ustc.edu.
5
College of Environment and Resources, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China. shiyq1986@fzu.edu.cn.
6
College of Civil Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou 350116, China. fulibi@fzu.edu.cn.
7
School of Materials Science & Engineering, Nanyang Technological University, Singapore 639798, Singapore. lulu.xu@ntu.edu.sg.
8
Department of Architecture and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon 999077, Hong Kong. yubin2-c@my.cityu.edu.hk.

Abstract

Manganese dioxide (MnO₂), as a promising green material, has recently attracted considerable attention of researchers from various fields. In this work, a facile method was introduced to prepare binary hybrids by fabricating three-dimensional (3D) zinc hydroxystannate (ZHS) cubes on two-dimensional (2D) MnO₂ nanosheets towards excellent flame retardancy and toxic effluent elimination of epoxy (EP) resin. Microstructural analysis confirmed that the morphologies and structures of MnO₂@ZHS binary hybrids were well characterized, implying the successful synthesis. Additionally, the morphological characterization indicated that MnO₂@ZHS binary hybrids could achieve satisfactory interfacial interaction with the EP matrix and be well dispersed in nanocomposites. Cone calorimeter test suggested that MnO₂@ZHS binary hybrids effectively suppressed the peak of heat release rate and total heat release of EP nanocomposites, performing better than MnO₂ or ZHS alone. Condensed-phase analysis revealed that MnO₂@ZHS binary hybrids could promote the char density and graphitization degree of char residues and thereby successfully retard the permeation of oxygen and flammable gases. Moreover, through the analysis of gas phase, it can be concluded that MnO₂@ZHS binary hybrids could efficiently suppress the production of toxic gases during the degradation of EP nanocomposites. This work implies that the construction of 2D/3D binary hybrids with an interfacial interaction is an effective way to fabricate high-performance flame retardants for EP.

KEYWORDS:

binary hybrids; epoxy resin; flame retardancy; manganese dioxide; zinc hydroxystannate

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